Benadryl side effects - from FDA reports


Summary

In this review, we analyze Benadryl side effects by the time on the drug, gender and age of the people who have side effects while taking Benadryl. The review is based on 44,988 people who have side effects while taking the drug from FDA, and is updated regularly.

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Benadryl

Benadryl has active ingredients of diphenhydramine hydrochloride. It is often used in allergies. (latest outcomes from Benadryl 49,081 users)

On Oct, 20, 2017

44,988 people who take Benadryl are studied.


Number of reports submitted per year:

Benadryl side effects.

Most common side effects over time *:

< 1 month:
  • urticaria
  • vomiting
  • rash
  • hypersensitivity
  • infusion related reaction
  • somnolence
  • dyspnoea
  • pyrexia
  • headache
  • tremor
1 - 6 months:
  • thrombocytopenia
  • weight increased
  • death
  • vomiting
  • weight decreased
  • respiratory failure
  • febrile neutropenia
  • urticaria
  • mucosal inflammation
  • sepsis
6 - 12 months:
  • vomiting
  • atrial septal defect
  • viral infection
  • acute respiratory distress syndrome
  • appendicitis
  • confusional state
  • hypertension
  • pain
  • pregnancy induced hypertension
  • urinary tract infection
1 - 2 years:
  • weight decreased
  • intervertebral disc protrusion
  • somnolence
  • vomiting
  • abdominal pain upper
  • atrial septal defect
  • convulsion
  • dizziness
  • nephrogenic systemic fibrosis
  • visual impairment
2 - 5 years:
  • drug withdrawal convulsions
  • tachycardia
  • urticaria
  • respiratory arrest
  • weakness
  • weight decreased
  • anger
  • depression
  • diabetes mellitus
  • dizziness
5 - 10 years:
  • anaphylactic shock
  • headache
  • mastocytosis
  • post procedural bile leak
  • tic
  • tongue disorder
  • traumatic brain injury
  • weight increased
  • weight loss poor
10+ years:
  • arrhythmia
  • cognitive disorder
  • constipation
  • disability
  • drug abuse
  • dyspnoea
  • haemorrhage
  • hypersensitivity
  • multiple system atrophy
  • nephrolithiasis
not specified:
  • vomiting
  • urticaria
  • weight decreased
  • rash
  • weight increased
  • drug ineffective
  • nausea
  • white blood cell count decreased
  • tremor
  • infusion related reaction

Most common side effects by gender *:

female:
  • vomiting
  • urticaria
  • weight decreased
  • weight increased
  • rash
  • nausea
  • white blood cell count decreased
  • tremor
  • hypersensitivity
  • drug hypersensitivity
male:
  • vomiting
  • urticaria
  • weight decreased
  • rash
  • infusion related reaction
  • pyrexia
  • tremor
  • death
  • weight increased
  • white blood cell count decreased

Most common side effects by age *:

0-1:
  • urticaria
  • vomiting
  • premature baby
  • sudden infant death syndrome
  • tremor
  • death
  • myocarditis post infection
  • overdose
  • supraventricular tachycardia
  • wheezing
2-9:
  • vomiting
  • urticaria
  • pyrexia
  • somnolence
  • respiratory distress
  • weight decreased
  • wheezing
  • tremor
  • hypersensitivity
  • tachycardia
10-19:
  • vomiting
  • urticaria
  • infusion related reaction
  • tremor
  • pyrexia
  • weight increased
  • rash
  • throat tightness
  • crohn's disease
  • somnolence
20-29:
  • urticaria
  • vomiting
  • pulmonary embolism
  • weight decreased
  • dyspnoea
  • pain
  • nausea
  • tremor
  • throat tightness
  • rash
30-39:
  • vomiting
  • urticaria
  • weight increased
  • rash
  • weight decreased
  • nausea
  • infusion related reaction
  • pyrexia
  • pulmonary embolism
  • somnolence
40-49:
  • vomiting
  • urticaria
  • weight decreased
  • weight increased
  • rash
  • nausea
  • pyrexia
  • white blood cell count decreased
  • hypersensitivity
  • tremor
50-59:
  • vomiting
  • urticaria
  • weight decreased
  • rash
  • weight increased
  • nausea
  • tremor
  • hypersensitivity
  • infusion related reaction
  • white blood cell count decreased
60+:
  • vomiting
  • weight decreased
  • urticaria
  • rash
  • white blood cell count decreased
  • infusion related reaction
  • pneumonia
  • weight increased
  • pyrexia
  • tremor

* Approximation only. Some reports may have incomplete information.

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On eHealthMe, Benadryl (diphenhydramine hydrochloride) is often used to treat hypersensitivity. Find out below the conditions the drugs are used for and how effective they are.

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